It's a shame they didn't test CouchBase 2.0 (or at least 1.8)... and really kinda silly, given that it is pretty widely used commercially. I think CouchBase may be the most successful NoSQL database, when it comes to commercial installations (for large customers, maybe mongodb has more total customers.)
Plus, I think it would have scored very well here.
I was curious about CouchBase myself. I know it's hard to run tests on every variation of the NoSQL fad, but CouchBase (IMHO) is a pretty sizable player.
Plus, I think it would have scored very well here.